feat(ui): 添加更新UI语言文件功能

- 在 ITranslationService 接口中添加 Reload 方法
- 在 JsonTranslationService 中实现 Reload 方法，支持重新加载语言文件并发送变更通知
- 在通用设置页面添加“更新”按钮，点击后从远程仓库下载最新语言文件
- 实现 OnUpdateUiLanguageAsync 命令，支持从 GitHub 和镜像源下载语言文件
- 下载后自动替换本地文件并重新加载翻译服务

BetterGenshinImpact/Service/Interface/ITranslationService.cs

@@ -35,5 +35,6 @@ public interface ITranslationService
     string Translate(string text);
     string Translate(string text, TranslationSourceInfo sourceInfo);
     CultureInfo GetCurrentCulture();
+    void Reload();
 }
 

BetterGenshinImpact/Service/JsonTranslationService.cs

@@ -58,6 +58,39 @@ public sealed class JsonTranslationService : ITranslationService, IDisposable
         }
     }
 
+    public void Reload()
+    {
+        var cultureName = _otherConfig.UiCultureInfoName ?? string.Empty;
+        string previousLoaded;
+        string currentLoaded;
+
+        lock (_sync)
+        {
+            previousLoaded = _loadedCultureName;
+            FlushMissingIfDirty(previousLoaded);
+
+            if (string.IsNullOrWhiteSpace(cultureName) || IsChineseCultureName(cultureName))
+            {
+                _loadedCultureName = string.Empty;
+                _map = new Dictionary<string, string>(StringComparer.Ordinal);
+                _existingMissingKeys = new HashSet<string>(StringComparer.Ordinal);
+            }
+            else
+            {
+                _loadedCultureName = cultureName;
+                _map = LoadMap(cultureName);
+                _existingMissingKeys = LoadExistingMissingKeys(cultureName);
+            }
+
+            _missingKeys.Clear();
+            Interlocked.Exchange(ref _dirtyMissing, 0);
+            currentLoaded = _loadedCultureName;
+        }
+
+        WeakReferenceMessenger.Default.Send(
+            new PropertyChangedMessage<object>(this, nameof(OtherConfig.UiCultureInfoName), previousLoaded, currentLoaded));
+    }
+
     public string Translate(string text)
     {
         return Translate(text, TranslationSourceInfo.From(MissingTextSource.Unknown));

BetterGenshinImpact/View/Pages/CommonSettingsPage.xaml

@@ -32,6 +32,7 @@
                     <Grid.ColumnDefinitions>
                         <ColumnDefinition Width="*" />
                         <ColumnDefinition Width="Auto" />
+                        <ColumnDefinition Width="Auto" />
                     </Grid.ColumnDefinitions>
                     <ui:TextBlock Grid.Row="0"
                                   Grid.Column="0"
@@ -43,9 +44,15 @@
                                   Foreground="{ui:ThemeResource TextFillColorTertiaryBrush}"
                                   Text="UI Language"
                                   TextWrapping="Wrap" />
+                    <ui:Button Grid.Row="0"
+                               Grid.RowSpan="2"
+                               Grid.Column="1"
+                               Margin="0,0,12,0"
+                               Command="{Binding UpdateUiLanguageCommand}"
+                               Content="更新" />
                     <ComboBox Grid.Row="0"
                               Grid.RowSpan="2"
-                              Grid.Column="1"
+                              Grid.Column="2"
                               Width="200"
                               Margin="0,0,36,0"
                               DisplayMemberPath="Value"

BetterGenshinImpact/ViewModel/Pages/CommonSettingsPageViewModel.cs

@@ -7,6 +7,9 @@ using System.Globalization;
 using System.IO;
 using System.IO.Compression;
 using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 using Windows.System;
@@ -20,6 +23,7 @@ using BetterGenshinImpact.GameTask.AutoTrackPath;
 using BetterGenshinImpact.GameTask.Common.Element.Assets;
 using BetterGenshinImpact.GameTask.LogParse;
 using BetterGenshinImpact.Helpers;
+using BetterGenshinImpact.Helpers.Http;
 using BetterGenshinImpact.Model;
 using BetterGenshinImpact.Service.Interface;
 using BetterGenshinImpact.Service.Notification;
@@ -34,6 +38,7 @@ using CommunityToolkit.Mvvm.Messaging.Messages;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Localization;
 using Microsoft.Win32;
+using Newtonsoft.Json;
 using Wpf.Ui;
 
 namespace BetterGenshinImpact.ViewModel.Pages;
@@ -89,6 +94,94 @@ public partial class CommonSettingsPageViewModel : ViewModel
                 }
             );
 
+    [RelayCommand]
+    private async Task OnUpdateUiLanguageAsync()
+    {
+        var cultureName = Config.OtherConfig.UiCultureInfoName ?? string.Empty;
+        if (string.IsNullOrWhiteSpace(cultureName))
+        {
+            throw new InvalidOperationException("当前UI语言为空，无法更新语言文件。");
+        }
+
+        if (cultureName == "zh-Hans")
+        {
+            await ThemedMessageBox.InformationAsync("zh-Hans 无语言文件，无需更新。");
+            return;
+        }
+
+        var urls = new[]
+        {
+            $"https://raw.githubusercontent.com/babalae/bettergi-i18n/refs/heads/main/i18n/{cultureName}.json",
+            $"https://cnb.cool/bettergi/bettergi-i18n/-/git/raw/main/i18n/{cultureName}.json"
+        };
+
+        using var httpClient = new HttpClient
+        {
+            Timeout = TimeSpan.FromSeconds(30)
+        };
+
+        byte[]? bytes = null;
+        Exception? lastError = null;
+        var allNotFound = true;
+        foreach (var url in urls)
+        {
+            try
+            {
+                using var request = new HttpRequestMessage(HttpMethod.Get, url);
+                request.Headers.UserAgent.ParseAdd("BetterGenshinImpact");
+                using var response = await httpClient.SendAsync(request);
+                if (response.StatusCode == HttpStatusCode.NotFound)
+                {
+                    lastError = new HttpRequestException("Language file not found.", null, response.StatusCode);
+                    continue;
+                }
+
+                allNotFound = false;
+                response.EnsureSuccessStatusCode();
+                bytes = await response.Content.ReadAsByteArrayAsync();
+
+                var json = Encoding.UTF8.GetString(bytes);
+                _ = JsonConvert.DeserializeObject<Dictionary<string, string>>(json)
+                    ?? throw new JsonException("翻译文件不是有效的 JSON 字典。");
+                break;
+            }
+            catch (Exception e)
+            {
+                lastError = e;
+                allNotFound = false;
+            }
+        }
+
+        if (bytes == null)
+        {
+            if (allNotFound)
+            {
+                await ThemedMessageBox.WarningAsync($"语言文件不存在：{cultureName}.json");
+                return;
+            }
+
+            throw new Exception($"下载语言文件失败：{cultureName}.json", lastError);
+        }
+
+        var dir = Global.Absolute(@"User\I18n");
+        Directory.CreateDirectory(dir);
+        var path = Path.Combine(dir, $"{cultureName}.json");
+        var tmp = $"{path}.{Guid.NewGuid():N}.tmp";
+        await File.WriteAllBytesAsync(tmp, bytes);
+
+        if (File.Exists(path))
+        {
+            File.Replace(tmp, path, null);
+        }
+        else
+        {
+            File.Move(tmp, path);
+        }
+
+        var translator = App.GetService<ITranslationService>() ?? throw new NullReferenceException();
+        translator.Reload();
+    }
+
     public string SelectedCountry
     {
         get => _selectedCountry;